AngularJS expressions are used for display data from your Model to View.
You can write expressions in double curly braces {{ expression }}.
It is like one way binding from your Model to View and works just like ng-bind attribute.
AngularJS expressions output the data where it is written. You can write expression with any numbers, strings, objects and arrays.
A...

An AngularJS application is divided into two parts:
Application
Bindings
AngularJS Application
An AngularJS application defines the section of HTML that starts the AngularJS application. We define the application using the ng-app attribute. You can add this attribute with any HTML element like body, div, table.
<body>
<div ng-app>
<...